Abbreviation: REDC (J. F. Christ, 1947)
Word length: 7,350 (C. E. Lauterbach, 1960)
First published: Strand Magazine, in two parts, March and April 1911
The impossibility of the cipher in this story (because the Italian alphabet isn't exactly the same as the English one) has drawn remark and speculation from Sherlockian scholars for decades. Do such authorial blunders, of which there are examples in many other cases as well, increase or decrease the reader's affection for the stories of Sherlock Holmes?